Niagara ChemicalCleanup of this former pesticide plant in Harlingen, Cameron County is complete. Releases at the site contaminated the groundwater and soil at the site with arsenic, lead and pesticides.http://www.tceq.texas.gov/remediation/superfund/state/niagara.htmlhttp://www.tceq.texas.gov/@@site-logo/tceqlogo-3colors.gif

Niagara Chemical

Cleanup of this former pesticide plant in Harlingen, Cameron County is complete. Releases at the site contaminated the groundwater and soil at the site with arsenic, lead and pesticides.

Site Summary The Niagara Chemical site occupies 2 acres west of the intersection of Commerce Street and Adams Avenue near downtown Harlingen. Liquid and dry pesticides were formulated at the plant from 1946 to 1962, and pesticide blending and storage continued until 1968.

The plant was shut down and the buildings were razed in 1970, leaving only concrete slab foundations on the site. Three 10,000-gallon underground storage tanks were removed before the TCEQ began remedial investigations.

During the remedial investigation, soil and groundwater at the site were found to be contaminated with arsenic and organochlorine pesticides at concentrations requiring remedial action.

Remedial Action In 1996, the TCEQ entered into another agreed order with the PRPs to conduct the remedial design and remedial action. The selected remedy consisted of removing and disposing of contaminated soils off-site and monitoring for chemicals of concern in groundwater.